This original size Hoberman sphere is a combination of geometry, engineering and beauty that was specially designed with super bright night time glow. Hang this glowing green sphere from the ceiling and using the pulley, create an expanding mobile that magically unfolds from 9.5" to 30"! Also included are the "21 Cool Things To Do" activity sheet and an educational booklet about the geometry of the sphere.Details:MoonGlow10.1" x 10.1" x 9.6" package sizeContents include: 1 expanding sphere, pulley and instructionsFor 1 playerMade in ChinaBrand new condition in original packagingWipe clean with dry or damp clothFor ages 4 and up